[V8] Electricity and Fluids WAS RE: If you think Audi parts are expensive....

[d saad]

That is how all fuel pumps (high pressure anyway) work to this day.
Without oxygen, there can be no ignition.
It seems crazy - and when I
also took apart a fuel pump, I could not believe my eyes but there it was.
Blue sparks a blazing off the brushes.

btw, an airliner crashed
off the east coast maybe 10 years ago. I seem to remember the cause being
a fuel pump in a tank that was "too empty" meaning too much
oxygen in it.
Anyone remember the real facts on that one?

Dave


> I worked at a VW shop in '78-'79.. Bosch
K-Jetronic fuel injection uses a
> high pressure fuel pump that is
in essence a motor (WITH BRUSHES) and an
> impeller at one end all
encased in a metal housing with an inlet at one
> end
>
and outlet at the other. Yes folks, the gasoline flows RIGHT THROUGH
the
> electric motor and armature, brushes, and all then thru the
impeller
> (perhaps really a propeller) and out of the pump.  I
changed one out on a
> '70 VW type III and took it the old one
apart and was AMAZED at this
> design.
> I realize that
gasoline (liquid) doesn't ignite (too easily) but what
> happens
if you start running out of gas and get an air/fuel mix being
>
stirred up in there??
> 
> I could imagine the owner
manual. "Attention (Achtung) -- Running out of
> fuel is bad
for your fuel-injected Volkswagen. It could cause your vehicle
>
to unexpectedly explode. Please remain aware as to your fuel
level."
> 
> I must be wrong about the potential for
this to happen. I can't imagine
> they
> would let it out
of the factory if explosion was a possibility...(Well,
> Ford
> did it with the Pinto..HMMM)
> 
> Anyways, it's
strange to have the gas flow thru the electric motor,
> Maurice
> 
> 
> 
> -----Original Message-----
>
From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com]
On Behalf
> Of
> Scott DeWitt
> Sent: Wednesday,
May 16, 2007 4:38 AM
> To: Dan DiBiase; cobram at juno.com;
v8 at audifans.com
> Cc: quattro at audifans.com
> Subject: Re:
[V8] If you think Audi parts are expensive....
> 
>
Electricity takes the path of least resistance, so when you have a
> conductor
> 
> such as copper, in a pool of water
electricity will flow through the
> copper
> conductor
instead of the coolant.
> Induction furnaces have used this for
years.
> 
> ----- Original Message -----
>
From: "Dan DiBiase" <d_dibiase at yahoo.com>
> To:
<cobram at juno.com>; <v8 at audifans.com>
> Cc:
<quattro at audifans.com>
> Sent: Wednesday, May 16, 2007 6:02
AM
> Subject: Re: [V8] If you think Audi parts are
expensive....
> 
> 
>> cobram at juno.com wrote:
Spoke with a friend of mine today, he works at a
>> Mercyless
Benz/Maybach
>> dealership as a tech.  Swapped out an
alternator on one today, a water
>> cooled alternator.  When
the alternator went out it took out some
>> electronics in the
instrument cluster.  Car is still under
>> warranty....warranty
repair submitted to Maybach.....$21,000.  Yep,
>> twenty one
thousand dollars.  Alternator is around $10k, cluster around
>>
$10k + $1k in labor.
>>
>> ---------------------
>> A water cooled alternator? I dunno, combining electricity and
water
>> seems
>> strange to me. Another strange
design is in my MGB - they put the heater
>> valve (which
controls coolant flow into the heater) DIRECTLY above the
>>
distributor. So when the valve goes, it leaks water onto the
>>
distributor.
>> Guess they did that instead of a warning light,
because you definitely
>> know when your heater valve is
leaking!
>>
>> Dan D
>> '04 A4 1.8Tq
MT-6
>> Central NJ USA
>>
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